CVE-2026-72789

HIGH 8.6

SiYuan before v3.7.4 Authentication Bypass via Encrypted Notebooks

CVSS Score

8.6

EPSS Score

0.0%

EPSS Percentile

0th

SiYuan before v3.7.4 fails to properly validate publish access for encrypted notebooks, treating them as publicly accessible by default. Anonymous readers can enumerate and retrieve fully decrypted document content from unlocked encrypted notebooks through the publish API without authentication or key material.

CWE	CWE-862
Vendor	siyuan-note
Product	siyuan
Published	Aug 12, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

None

Availability

None

Affected Versions

siyuan-note / siyuan

0 < 3.7.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/siyuan-note/siyuan/security/advisories/GHSA-v684-q882-jgmq vulncheck.com: https://www.vulncheck.com/advisories/siyuan-before-authentication-bypass-via-encrypted-notebooks

Credits

🔍 shirshakopencti